Elevator



July 12, 1927.

J. DARBY ELEVATOR Filed Dec. 24. 1925 6 Sheets-Sheet 1 1 July 12,1927. 7 J DARBY 635264 ELEVATOR Filed Dec. 24,1925 6 Sheets-Sheet 1' 2 2mm 1") Y l/WEN TOR MM 1,635,264 J. DARBY ELEVATOR Jul 12, 1927.

Filed Dec. 24. 1925 'S'Shgets-Sheet 3 p I I 4' INVENTOR M 7 B) I v A 0mm Jilly 12, 1927.

1,635,264 J. DARBY ELEVATOR Filed Dec. '24. 19.25 6 Shoots-Sheet.

u v I l July 12,1927. I DARBY 63 ,264

ELEVATOR 111 a Dec. 24.1925 "s-"sjmm-snm s I I I i "{(I x II I H I W I a|m| h INVENTOE sr I MMWM J- DARBY. I

ELEVATOR iled Dec Shouts-s 6 IN VENTOI? l lll ll door operating motor Patented July 12, 1927.

UNITED STATES, tears-N T OFF-ICE.

.:JOHN.1DABBY, OF PHILADELPHIA, PENNSYLVANiA, ASSIGNOB snon Loosamuramore SAFETY CO.-ING., or NEW YORK, N.KY.,.1ACORPOBATION,OENEW YORK.

ELEVATOR.

Application filed'December 24,1925 SerialNo. 77,441.

This invention relates to elevator mechanism'of the general character of that shown in LettersPatent of t-heUnited'St-atesof 'Glenn SuWilli-amson, "December22, 1925, in which the power for No. 1,566,713, dated operatingthedoor of the car or of the elevator shaft, .or the-doors ofboth, is supplied .by an air compressor "in operative relation with some moving part of the elevator mechfll'liSHISO'thZtt it *shall'be-driven when and only when the elevator car is moved and by the same power :whiclrmoves the elevator car, regardlessof the direction of movement of the car, suitable provision being "made can be moved ineither Various devices 'have'be'en proposed heretofore whereby power'can The stored during the movement. of the" car, to be appliedat the will of. the operator 'infthe movement of the doors, involving*tonexample, the storing of power in a spring-Orin a weight, but such devices'have .not proved altogether satisfactory in operation. Inythe arrangement described in 'the application above nientioned, an air compressor mounted on the car stores air vunder compression .in a tank from which it is supplied directly to the mot ordevices by whichthe door is moved, which a-rrangement is preferable toqthose in which ,power is stored in a spring or in a weight,-

the operation of'wh'ich' cannot be controlled SELtISfEI CtOI'Ily.

By the present invention it has been sought to overcome such OlOJQCtlOilS as. there may be tot-he actuation .of the door op,erat-' 'ing meansdirectly by compressediair drawn from the receiver in whichit is. stored by the compressor :on the car and in accordance with thepresent invention provision is made wherebythepower'means, such asa pump, actuated by. the movement of the "car, acts upon an incompressible medium,:such as'oil, and delivers it to an air tank or receiver in which air or" some other compressible medium is compressed to'a predetermined 'degree and its pressure is-made toactuate the so as to cause it to move the door in one directionor the other under .the control of the operator. The invention is' further concerned with the me chanical devices throughwhich the oower of ,the door operating motor is applied to the door and to. the devices through which it is be explained more need,'ton1'ove the door independently of the door operating motor. The inventionzwill fully hereinafter with reference: tov the accompanying drawings in which it is illustrated ELSLBIHbOdlECl in a suitable structure and: in which:

-Figure 1 'isa View 1n elevation, :partly broken ofi', sho.wing a portionof an elevator car equipped with the improved door operatingdevices, a portion of a shaft door-being also shown.

Figure 2 is a diagrammatic view, illustratingi more particularly the :means whereby the power devices on through the movement'xof theicar.

the 3 car are actuated IFigure: 3 1s a view.in'elevat1on, partly 'broken-othsof'the partsshowninFigure 1 as seen from the left-hand insaid-figure.

.F1gure-4. is a .detail view ofthewfour-way valve shown in Figures 1 and 2.

Figure 5 is a view partly in vertical'sec- 131011- and partly in elevation, showing-particularly the'power source onthe car; and some-of its connections.

I Figure 6 is a view in elevation of the parts --shown in Figurefi5 as seen If-rom the lethand. i

Figure 7 is-a'view in elevation andon a *larger scale of: the operating connections through whlch the door'motor on the car. is

made to move the door.

jFigu-ref8 is a view of-thesame' as seen "from above.

Figure 9'is'a view of the same in elevation as seen from the left-hand .in Figure 8.

Figures-lO, 11 and 12 are detail views of some parts of the operative connections 'shown in- F gu-resf'l', 8 and 9.

Figures 13 and Marc detail views in horizontal section and i'n elevation respectively,

of :the devices for effecting engagement between the traveller hereinafter referred to 2 and the door.

Figure 15 is a partial view generally similar to Figure 1 but illustrating the application of an automatic control for the door operating motor.

ill)

Figure-16 is a diagrammatic view illus- 1 trating the construction and arrangement of such an automatic control.

Figure 17 is a detail viewof a car controller handle. I

In Figure 1 of the drawing there is shown at a a portion of'th e frame or body of an elevator cm f ordinary construction,

floor being indicated at a. It is assumed that the ear is raised or lowered by any usual or suitable means sufficiently indicated at 0, in Figure 2, since the present invention is not concerned therewith. It is also assumed that the car is provided with a controller box and handle and an interlocking rod which operates in the usual manner to prevent the movement of the controller handle to start the car when the car door or the shaft door is not in closed position. These parts may be of any usual or suitable construction and need not be shown, the present invention not being directly concerned therewith. At each shaft landing there is a suitable door 6, which is movable horizontally to open or close the shaft opening through the operation of the devices hereinafter described. This door is shown as of a pivoted lattice construction but obviously may be of any suitable character.

In the embodiment of the invention illustrated in the-drawings, particularly in Figure 2, as a suitable means for the operation of the power or pump hereinafter mentioned, a relatively fixed cable 0, which may have connected to it at its lower end a weight 0 for the purpose of maintaining it under tension, and may have its upper end connected to a relatively fixed pointat the top of the elevator shaft, as at 0 is passed about sheaves 0 and 0 one of which, in the construction shown, operates a double-acting pump (Z (secured to the underside of the car floor) through the medium of a crank disc cl, shown in broken lines in Figure 5, to which are connected the pitmen (Z of two pistons e which reciprocate in corresponding cylinders 0 The cylinders are shown as mounted within a tank 6 with which each cylinderis connected through a suitable intake valve 0". From each cylinder the in compressible medium, such as oil, which is operated upon by this power motor or source of power, is delivered through a suitable outlet valve 6 and pipe connection 6 to an air tank or receiver 6 in which air, or some other suitable compressible fluid, is compressed by the delivery to the receiver of the incompressible medium supplied by the source of power.

In order that an excessive pressure shall not be developed in the receiver a, there s provided suitable means through which, when the required pressure has been developed in the receiver 0", the delivery of the incompressible medium to the receiver 6 is stoppd and the medium is returned directly to the reservoir c, notwithstanding the continued operation of the power source in the movement of the elevator car. As shown, the receiver 6 is connected by a pipe 6 with an ordinary diaphragm pressure regulator e the stem 6 of which carries a valve 6 which controls the delivery of the compressible medium through a connection a into the receiver a and a valve 6 which controls the return of the incompressible medium to the reservoir 6 through a connection 0 A check valve 6 may be introduced in the connection 6 As will be understood, development of the predetermined pressure in the receiver 0 moves the regulator stem 6 downward against the pressure of the spring 6 seating the valve 0 so as to prevent the further delivery of fluid to the receiver 6", and unseating the valve 6 so that the fluid is thereby bypassed or short-circuited and returned directly to the tank 6 It will be understood that by the delivery of the oil or other incompressible fluid into the bottom of the receiver 6 which is closed at its top, the air in the receiver is compressed therein and that the pressure so developed can be applied to the operation of the elevator doors. This is most conveniently accomplished, in accordance with the present invention, through the medium of the same incompressible fluid by which the pressure is developed. As shown, the oil or other incompressible fluid can be delivered from the lower end of the receiver 6 through a connection 6 and branch connections 6 6 under the control of a fourway valve of ordinary construction, as shown at e in Figures 1 and 2 and in detail in V Figure "2 to one end or the other of a power cylinder 7, which is also mounted on the car. The valve 6 is provided with a suitable handle 6, for operation by the operator or conductor and has also a connection 6 with the tank 0 the construction of the four-way valve being such, as shown in F igure 4, that. when connection is made from the receiver 6 to one or the other of'the branches 0 6, the other branch is connected to the tank a so as to return to the tank the oil which is discharged from the, corresponding end of the cylinder 7. c

As shown in Figures 3 and 9, the rod f of the piston within the cylinder 7 carries a rack P which, in the arrangement shown, engages a gear segment 7, which carries a bevel gear segment 7 in engagement with a corresponding bevel segment 7", mounted loosely on a shaft f, which is mounted in suitable bearings on the elevator car. A clutch member 7, splined on the shaft 7 so to rotate therewith but to be capable of longitudinal movement thereon. and provided with pins f for engagement with the bevel gear segment f", provides a means under the control of the'operator for effecting operating engagement and disengagement between the bevel gear segment and the shaft f. As shown, the clutch member 7 is engaged by a clutch lever f", shown clearly in Figures 3 and 9, which has a pin f engaged in a cam slot f formed in a bracket f foot press slotted upper end f of the rod which is carriediby a vertical rod 7, held normally in its elevated position through its connection with devices to be described, so that the clutch member 7 is held normally in engagement with the bevel segment and capable of being moved downward to disengage the clutch member and perform another function to be described, through its connection at its lower end to a lever 7', shown in Figures 1 and'3, under control of the operator, through a Partial rotation of the shaft f either by the;power devices or by the operator as hereinafter described, feffects first the 'engageme-nt of the hereinafter mentioned traveller with the shaft door, and'then effects movement of the traveller to open the'door. In the arrangement of the door operating devicesshown, throughwhich the movement of the door is'effected through operation of the door operating motor represented by the cylinder f, the shaft f has keyed thereon, as shown in Figure 11, a sector g wluch carriesat-one pointa pin 9 engagedby the so that upondownward movement of the rod 7 through pressure applied to; the foot press 15 and lever the sector and the shaft w'illbe rocked, while movement of the sector by the power devices can" be effected without moving therod f. The sector also carries, for a purpose to be explain-ecL-a preferably squared .pin 9' It also is provided on its opposite side with a lug g which supports a rod g curved in an arc concentric The rod g serves as a support for thesprmgig (omitted from Figure 12 tov avoid confusion) with the sector and the shaft.

-which'abuts at one end against a lug g and-at the other end against a lug h on the sector h which floats or is mounted loosely on theshaft f. In the relative movement of the-sectors 'g and'h, the curved rod 5/ .isguided in the lug it, which is perforated,

for the purpose. The lug h, as shown by broken lines in Figures 7 and 11, is formed at the end of a radial rib if on the corresponding side of the sector h and the sector is alsoprovided with a stud formed with aneccentrio g capable of rotation on the stud for the purpose of effectingclose such engagement must therefore It will now be understood that in the the abutments g and 71 without producing any movement of the sector it. The purpose i'nthus delaying themovement of the sector/L is to permit the sector 9, in its initial movement,11to effect, through devices to be "described, engagement between the traveller hereinafter mentioned and the shaft door.

Eventually, however, either through compression ofthe spring g or through operatit e/engagement effected by contact or the eccentric sleeve 9 with the rib 7L2 of the sector it, the sector '72, is moved by the .sectorg andcontinues to be moved throughout the movement of the sector '9'. a The movement of'th'e sector/t on its'axis'efiects,

througlrth'e devices to be described, the movement of the door.

'Su-p'ported on the top of the car are rails, 2,2", on which is mounted'for horizontal 'movem'ent a traveller provided with rollers 70- 'Which engage the rails.

.The' trai e'ller 70, which is 'operatively engag'ed with 'the door as hereinafter described. has pivotally connected thereto-one meml-ier b of a toggle lever, the other member-"k of which is secured to the sector b as shown in Figures 8, Hand 12, whereby, when the sector h 'is rocked on;1ts-a: is,-as above explamerhi the toggle lever is flexed.

as indicated by broken lines'in Figure l,

and' the. traveller 0 is moved from the position shown by full'lines' in Figure 1 to the positionshown'by' broken lines in the same figure.

shaft opening, the traveller is not in -operative engagement with the shaft door and be effected betore'the door can be. opened. The initial movement/of the sectory is made to effect such e 'igagement through the devicesnow to be described: Substantia'l'lyas shown and described 'in' the application above men- 'tioned, the traveller 7c is provided with opposed; jaws 76, mounted to swing on vertical axes, inter-connected, as shown for example at 70" in Figures 13 and 14-, so that they shall move together, and held normally in retracted or inoperative position by coiled springs k These jaws are adapted to be moved into operative position, as shown by broken lines in Figure 13, to engage between ,thenra bar I) carried by the door 6. One of thesejaws has an arm It" which carries a roller 75*, shown clearly in Figure 13. In the retracted or inoperative position of the jaws 70 the roller 10 res-:tsin a slot Z formed in a bar Z which is supported on the car, preferably between the railsiand 2", so as to be capable of limited longitudinal movement. Suchinovement of the bar Z to'the right from kits initial position forces the roller 70 out ofthe slot land moves the jaws'ic from their retracted or inoperative positions to their extended or operativepositions, as in As the car comes to rest at anyfloor or dicated by broken lines in Figure 13. So long as the bar Z remains in its new position, the jaws 7s will be retained in their extended or working positions, but as soon as the bar Z is permitted to return to its initial position, the roller will move into the slot Z and the aws 7; will be returned by the springs 776 to their retracted or inoperative positions.

The bar Z is held normally in its initial position by a coiled spring Z which, as shown in Figures 1, 7 and 8, abuts at one end against the frame which supports the tracks 2', z" and the bar Z and at its other end against a lug or bracket Z on the bar Z. To etlect longitudinal movement of, the bar Z for the purpose of moving the jaws 70 to extended or working position, there is pivotally mounted on an arm m, of one of the standards m which supports the shaft 7", a rocker arm n which carries at its lower end a roller 11/ to bear against the end of the bar Z. At its upper end, above its pivot n it bears a spring pressed latch 11, adapted for engagement with the squared pin g of the sector 9 and provided with an adjusting screw n to limit the movement of the latch. As the radius of the shorter portion of the rocker arm n is considerably less than the radius of the pin g and is non-concentric therewith, it will be seen that while in the initial movement of the sector 9 the rocker arm will be moved through. the engagement of the latch 11 with the pin 9 and the bar Z will be moved against the tension of the spring Z so as to throw the jaws 70 into extended or working position, the latch a in the continued movement of the sector 9, will be disengaged from the pin 9 and the bar Z will be returned to its initial position. This does not take place, however, until the movement of the traveller has commenced, so that during the continued movement of the carrier during the opening movement of the door and also during the closing movement the door, the roller k will rest against the bar Z and the jaws a" will be held thereby in extended or working position until, in the return of the traveller, the door reaches its fully closed position when the roller moves again into the slot Z and the jaws are returned by their springs to the retracted or inoperative position.

It will be understood, of course, that the moven'ient of the traveller in the opening of the door and thereafter in the closing of the door is eli'ected by the door operating motor f under the manipulation of the four-way valve 6' by the operator. it will also be understood that the movement of the sector f/ to effect the engagement of the traveller to the foot press f without operation of the door operating motor 7 and also that the slotting of the upper end of the vertical rod 7' permits the operation of the door by power without movement of the rod 7 and its associated parts.

In the foregoing explanation of the nature 0 i the invention with reference to its embodiment in the construction thus far described, it has been assumed that the door operating motor is controlled by the operator through the manipulation of the valve 6 but it will be obvious that it might be controlled by automatic or semi-automatic devices, the operation of which is initiated by or involved with the movement of the car itself, so that the operation of the door operating motor, to open the door, is effected automatically as the car comes to rest. One form of such automatic devices is illustrated in Fig ures 15, 16 and 17 and will now be described.

The shaft 0 which carries the sheave 0* is shown as having a gear 0 which meshes with a pinion a on a governor shaft 0 which carries an ordinary governor 0 The longitudinally movable sleeve 0 of the governor carries an insulated bridge piece 0 which, when the governor is at rest and therefore when the elevator car is stationary, bridges two electrical terminals 5 and 6. 1 11611 the car is in motion and the governor is rotated, the bridge piece 0* is withdrawn from the terminals 5 and 6 and the circuit therethrough is opened.

Positioned in suitable proximity to the governor is a magnet 7, the electrical connections of which will be referred to hereinafter. Associated with the'magnet 7 is an armature lever 8 which carries an insu lated bridge piece 9 to bridge the gap be-v tween two terminals 11 and 12, the armature being held normally in contact with the terminals as by a spring 10. An extension 13 of the armature 8 beyond its pivot is adapted to be engaged by a latch 14 in such operative relation with the governor that when the governor is in motion and the bridge piece a is withdrawn, the latch disengages the armature extension 13 and permits the arn'iature to be influenced by the HIZU UQt T. A spring 16 holds the latch normally in engagement with a flange on the movable sleeve of the governor.

The stem e of the door controlling valve 0 has fixed thereto an arm 24 which has a pin and slot connection with a lever 21, pivoted at 23. lhrough a pin and slot connection 20, 22, the lever 21 is operatively connected with the common armature 19 of two solenoids l7 and 18. The lever 21 carries a bridge piece 27 which is adapted, when the lever is in the full line position, to bridge the gap between two terminals 28, E29 and, when the lever is in the dotted line position, to bridge the gap between two terminals 30. 31.

Itwill'be observedthatthe terminal 6 is connected through'the solenoid 17 to the terminal'SO and that teriiinal 5 is connected through the terminals 11 and 12 and the ridge piece 9 to the positive nole of the battery B, the negative pole or which is connected to the terminal 31, from w ich' the circuit is completed to the terminal by the bridge piece 27 at the proper time.

It'will further be observed that the terminal 28 is connected through the winding of the magnet 7 to the negative pole of the battery and that the terminal 29 is connected through the solenoid 18 and the terminals 32, 33 of the button-switch H to the positive pole of the battery.

When the carcomes to rest and the movement of'the governor ceases, the arm 21 being just previous to that action in the dotted lineposition, the solenoid 17 is energized and'the lever 21 is thrown to the full line position, shifting the valve e so as. to admit pressure to the door operating notor to cause the door to open. This movement of the lever 21', it will be observed, by openingthe gap between the terminals 30, 31, breaks the circuit through the solenoid 17, leaving it dead.

To shift the'valve 6 so as to bring about the closing-of the door,"the lever 21 must be thrown from the full line position to the dotted line position. *To accomplish this the solenoid 18 must beenergized and this is effected by a button switch H conveniently located in the car,.as for example, in the controller handle, as shown in Figure 17. The operation of this switch closes the circuitfrom the positive side of the battery through the'solenoid- 18, and the terminals 29, 28'with the bridge piece 27 to thenegative pole of the battery. This movement of the lever 21, by the movement of the bridge piece 2? from the terminals 28, 29, breaks the'circuit through the solenoid 18 and in turn leaves it dead, while placing the connections through the solenoid 17 in readiness to have the circuit closed through them by the bridge piece a. 1

As the elevator car must not moveuntil the door is closed, the governor will not break the circuit through the solenoid-17, and unless another means is provided to break this circuit, themagnet 17 would again be energized when the lever 21 is moved to the dotted line position and the door would be opened; To prevent this 'actiomthe magnet? is provided so that when the circuitthrough the same is closed bythe operation of the button switch H, it is energized and the circuit through the solenoid '18 is broken at the gap 11, 12.

The circuit through the solenoid 17 might be kept open-until after the movement of the elevator car commences by holding the button switch H in closed position, but to avoid this necessity the latch 14 is provided, so that whenthe armature'S is influenced by the magnet 7 its xtension 13 will be enaged by the latch14: andxin this manner "he gap 11, 12 will be kept open and the latch is disengaged by the movement of the overnor soon as the movement of the ar hascommenced, leaving the armature ,8 free to be'actuated, bythe spring 10.

In theembodiment .of the invention illustrated in Figure 1 and. in the description of the construction thereshown, the door tobe operated is shownnand referred to as a shaft door, butthe term door as used inthe claims, unless otherwise specified, is tobe understoodlin a broad sense, as indicating a door ofany kind, either as to its particular construction or itslocation, and either asa shaft door or asa car door..

It will be seen that thevpump. and the ree ceiver or tank, with .the necessary QUEBEC. tions, constitute a convenient formof hydro: pneumatic power. generating means for the door operating .motor and any other form of hydro-pneumatic power generating means, whether operated through the movement of the car or otherwise, might be substituted for the particularform shown as the con venience or preference 'of the manufacturer oruser or the conditions of use might suggest.

Various changes in details of construction andarrangement can be made to suit different conditionsofnse and the invention, therefore,- eXcept as pointed out in the accompanyingclaims, is not limited to the particular construction and arrangement of parts .as shown. and. described, herein.

l claim asmy invention-z 1. In. an elevator, the combinationof a door, a. reciprocating door operating motor an air tank, means .by which an incompres sible medium :isforced' into the tank to compress the. air therein, connections from the tanktooppo'site sides of the door operating motorv to. determine the direction of move mentthereof by the incompressible medium under the pressure of the air inthe tank, and a manually controlled device to determine the delivery oftheincompressible mediumto one side or the other of the motor.

2. In an elevator, the combination ofa door, a door-operating motor, an air tank, a

pump to force an incompressible medium into the tank .to compress the air therein, a connection from thetank to the dooroperating motor through which the incompressible medium is-d'elivered from the tank under the pressure. ofthe air to the motor to actuate the same, and connections through which theincompressible medium is returned from the tank to the'pump.

3 111 tillQlGVtLtOlfitllB combination ofa door, a door operating motor, an air tank, a pump to force an incompressible medium into the tank to compress the air therein, a connection from the tank to the door operating motor whereby the pressure in the tank is transmitted to the motor to actuate the same, a connection through which the incompressible medium is short circuited through the pump, and devices controlled by the pressure in the tank to determine the connection of the pump to the tank or the short circuiting of the incompressible medium through the pump.

t. In an elevator, the combination of a door, a door operating motor, an air tank, a pump to force an incompressible medium into the tank to compress the air therein, a connection from the tank to the door operating motor whereby the pressure in the tank is transmitted to the motor to actuate the same, a connection through which the incompressible medium is short circuited through the pump, a valve to determine the delivery of the incompressible medium to the tank or the short circuiting of the same through the pump, and a device subject to the pressure in the tank to shift the valve.

5. In an elevator, the combination of a door, a traveller, a swinging spring retracted j aw carried by the traveller .and adapted to engage the door, said jaw having an operating arm, a movable bar mounted in proximity to the path of the movement of the traveller and having a slot for cooperation with said arm, means to operate the traveller, and devices actuated in the initial movement of said means to move the bar and thereby to move the jaw into operative position.

6. In an elevator, the combination of a door, a traveller, normally retracted door engaging devices carried by the traveller, a movable, spring pressed bar mounted in proximity to the path of the traveller and adapted to control the position of the door engaging devices, means to operate the traveller, and devices actuated in the initial movement of said means to move the bar and thereby to move the door engaging devices into operative position.

7. In an elevator, the combinationof a door, a traveller, normally retracted door engaging devices carried by the traveller, amovable spring pressed bar mounted in proximity to the path of the traveller and adapted to control the position of the door engaging devices, a sector operatively connected to the traveller, means to oscillate the sector, a rocker arm in operative relation with the bar to move the same, and means whereby the rocker arm is connected in the initial movement of the sector. I

8. In an elevator, the combination of a door, a traveller, normally retracted door engaging devices carried by the traveller, a-

movable spring pressed bar mounted in proximity to the path of the traveller and adapted to control the position of the door engaging devices, a sector operatively connected to the traveller, means to oscillate the sector, a rocker arm mounted non-concentrically with respect to the sector and in operative relation with the bar to move the same, and a latch carried by the rocker arm and engaged with the sector in the initial moven'ient thereof and disengaged therefrom in the movement of the sector.

9. In an elevator, the combination of a door, a traveller adapted to be connected to the door to move the same, normally retracted door engaging devices carried by the traveller, a sector, means to oscillate the same, a second sector operatively connected to the traveller, connections between the two sectors whereby movement of the second sector is effected in the continued movement of the first sector after its initial movement, and means whereby the door engaging devices are moved to operative position in the initial movement of the first sector.

10. In an elevator, the combination .of a car, a door operating traveller mounted on the car, a motor also mounted on the car, operating connections between the motor and the traveller including a clutch, devices mounted on the car and adapted to be actuated by the operator to actuate said connections, and means operated by the movement of said devices to disengage the clutch.

11. In an elevator, the combination of a car, a door operating traveller mounted on the car, a motor also mounted on the car, a rock shaft, operating connections between the motor andthe rock shaft and including a clutch, operating connections between the shaft and the traveller, devices mounted on the car and adapted to be actuated by the operator to actuate said last named connections, and means operated by the movement of said devices to disengage the clutch.

12. In an elevator, the combination of a door, a traveller, a swinging spring retracted jaw carried by the traveller and adapted to engage the door, said jaw having an operating arm, amovable bar mounted in proximity to the path of movement of the traveller and having a slot for cooperation with said arm, a toggle lever system having one member connected to. the traveller, means to oscillate the other member of the toggle lever system, and devices actuated in the initial movement of said means to movethe bar and thereby to move the jaw into operative position.

This specification signed this 23d day of December A. D. 1925.

JOHN DARBY. 

